html, body { height: 100%; margin: 0; }
body {
  display: grid;
  place-items: center;
  background: #ffffff;
  font-family: Arial, Helvetica, sans-serif;
}
h1 {
  margin: 0;
  font-weight: 700;
  /* responsive large size, adjusts to viewport */
  font-size: clamp(2.5rem, 12vw, 10rem);
  color: #000000;
}